The top power was 275 horsepower for Duster 340 buyers, who received a four-barrel carburetor, heavy-duty suspension, and upgraded stopping power thanks to front discs, all in exchange for a $400 fee.

But compared to Plymouth’s 53,000 Duster 340s sold with just a six-month head start, Demon 340’s 20,000 units make it a far rarer beast today, despite the differences being purely cosmetic.

Prices shown are the prices you can expect to pay for a 1973 Plymouth Duster 2 Door Sport Coupe (340) across different levels of condition. Edit options.

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